PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-11:57:10
G02     37.3           52.1                2.8 +/-    0.99       3.5 +/-    0.99  0.020 / 0.030
G05     135.6          64.0                4.7 +/-    0.69       5.1 +/-    0.69  0.030 / 0.020
G06     53.8           18.6                1.7 +/-    3.38       3.8 +/-    3.38  0.030 / 0.020
G12     200.1          66.1                2.2 +/-    0.53       2.4 +/-    0.53  0.030 / 0.030
G20     199.8          26.7                4.0 +/-    2.08       7.4 +/-    2.08  0.210 / 0.240
G25     292.7          55.2                1.2 +/-    2.76       1.4 +/-    2.76  0.140 / 0.190
G29     311.3          33.6               -0.0 +/-    1.28      -0.0 +/-    1.28  0.040 / 0.040